Angular Distribution of Production Planes in J/ψ→■ Decay

作者：沈巧蓉; 童心言^*; 龙云飞; 冒亚军

来源：Chinese Physics Letters, 2019, 36(06): 27-29.

A new observable, the angle between ■ decay planes, is proposed to test the theoretical predictions on the spin correlation. With 10 billion J/ψ events collected with the BES Ⅲ detector at the BEPCⅡ e+e- collider, the distribution of the angle could be measured to verify whether or not a correlation exists.

• 单位
  核物理与核技术国家重点实验室; 北京大学